CLIP energy: Using the CLIP model [1]}, we define the CLIP energy as the cosine distance between the embeddings of the image and the text \(\mathbf {t}\) , averaged over \(L\)  differentiable augmentations [2]}, [3]}:
\(E_{\text{CLIP}}(\mathbf {x}, \mathbf {t}) = \frac{1}{L} \sum _{l=1}^{L}\bigg (1 - \cos \Big \langle \text{CLIP}_{\text{img}}\big (\text{DiffAug}_{l}(\mathbf {x})\big ), \text{CLIP}_{\text{text}}(\mathbf {t})\Big \rangle \bigg ).\) 
